Type B Roof & Floor Deck

Q: Which Materials Do You Offer for Type B Panels?

We supply galvanized, prime painted, aluminum, and stainless materials and provide material certificates when needed.

Type B deck is the industry standard for industrial roofing and floor decking, and one of the most popular profiles in our roof and floor deck offerings. It can be produced in galvanized steel, prime painted steel, aluminum, and stainless steel. All lengths are produced to custom requirements. Standard width is 36" coverage, with limited availability in 30" coverage. This product has excellent load-carrying capabilities. The wide rib allows for a narrow top opening, which is desired when rigid insulation is to be used on top of the deck.

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Type B Roof Decking Features

Uniform spacing, precise rib geometry, and dependable fastener locations, supported by our full range of deck accessories, help crews work quickly and maintain consistent quality. This profile transfers roof forces into steel joists and beams while forming a stable base for membranes and insulation.

Galvanized B deck offers economical corrosion resistance, while stainless steel B deck withstands chemical exposure and coastal conditions. Many layouts also benefit from a 1.5-inch B deck when stiffness is a priority without adding unwanted weight.

Corrugated B Deck Performance

Corrugated B deck lends strong performance across projects that need predictable handling and efficient installation. The interlocking corrugated profile minimizes alignment issues and ensures consistent placement across large areas.

Uniform spacing, precise rib geometry, and dependable fastener locations help crews work quickly and maintain consistent quality. This profile is often chosen for clear spans, fast field installation, and stable behavior under live and environmental loads.

Material Options and Specs

Our material options include a wide range of gauges and finishes tailored to industrial environments. Galvanized B deck supports fast-turn orders and routine exposure conditions, while stainless steel B deck offers long-term protection in corrosive or high-moisture settings.

We also prepare optimized cut lists that reduce scrap on large packages and support efficient installation sequencing in the field.

Project Planning and Technical Support

Effective project planning starts with accurate takeoffs and compatibility checks that align your deck profile with insulation thickness and membrane assemblies. Our technical team reviews drawings, recommends fastener layouts, and confirms structural requirements before fabrication begins. Submittals, shop drawing notes, and mill certifications are prepared in advance to help you secure quick approvals and maintain schedule control. For more information, please see our technical resources.

JumpLinks Type B Deck Properties Available Type B Deck Additional Information

Type B Deck Properties

Section Properties (Fy=33 ksi)

Gage	Design Thickness	Weight (psf) Ptd	Weight (psf) Galv	Ip(In4)	In(In4)	Sp(In3)	Sn(In3)
22	.0295	1.58	1.61	0.1591	0.1891	0.1877	0.196
20	.0358	1.98	2.04	0.2067	0.2305	0.2327	0.2458
18	.0474	2.60	2.70	0.2981	0.3061	0.3166	0.3263
16	.0598	3.10	3.20	0.3869	0.3869	0.4063	0.4104
14	.0747	4.00	4.10	0.4845	0.4845	0.51	0.51
12	.1046	5.80	5.95	0.6819	0.6819	0.707	0.707
Section Properties calculated in accordance with AISI specifications.

METAL DECK PROPERTIES

GAGE	22	20	18	16
GAGE THICKNESS (in.)	0.0295	0.0358	0.0474	0.0598
WEIGHT (PSF)	1.7	2.1	2.8	3.5

(SEE LAYOUT FOR GAGES USED)

SECTION PROPERTIES PER FOOT OF WIDTH

GAGE	22	20	18	16
I_p (in.⁴)	0.15	0.20	0.29	0.38
I_n (in.⁴)	0.18	0.22	0.30	0.38
S_p (in.³)	0.18	0.23	0.31	0.4
S_n (in.³)	0.19	0.24	0.32	0.41

(SEE LAYOUT FOR GAGES USED)

AVAILABLE Type B Deck

Gage	Span Cond	Max SDI Const Sp	Uniform Total Load in Pounds Per Square Foot (Dead and Live)
Gage	Span Cond	Max SDI Const Sp	5’-0”	5’-6”	6’-0”	6’-6”	7’-0”	7’-6”	8’-0”	8’-6”	9’-0”	9’-6”	10’-0”
22	One	5’-9”	92	72	57	47	40	34	30
20		6’-6”	116	90	71	58	48	41	36	31
18		7’-9”	162	124	98	79	65	55	47	41	36	32
16		8’-9”		155	122	98	80	67	57	49	43	38	34
14		9’-8”		192	150	120	98	82	69	59	51	45	40
12		11’-8”				165	134	111	93	79	68	59	52
22	Two	6’-8”	100	83		69	59	51	44	39	34	31
20		7’-7”	123	102	85	73	63	54	48	42	38	34	30
18		9’-1”	165	136	114	97	84	73	64	57	50	45	41
16		10’-3”		172	145	123	106	92	81	72	64	57	52
14		11’-6”			180	153	132	115	101	89	80	71	64
12		13’-7”					183	159	140	124	110	99	89
22	Three or More	6’-8”	125	104	87	74	64	55	48	41	36	32
20		7’-7”	154	127	107	91	78	68	59	51	44	39	35
18		9’-1”		170	143	122	105	91	80	68	59	52	46
16		10’-3”			181	154	133	116	99	84	73	63	55
14		11’-6”				191	165	144	122	103	88	77	67
12		13’-7”						199	168	141	120	104	90
1. Load tables are calculated using section properties based on the steel design thichness shown in the Steel Deck Institute (SDI) design manual. 2. Loads shown in the shaded areas are governed by the live load deflection not in excess of 1/240 of the span. A dead load of 10 psf had been included.

Additional Information

Roof deck is essentially the structural component of the roof to transfer the load to the supports – typically steel joists or beams.

The main functions of roof deck:

The main functions of type B decks transfer loads to steel supports and serve as the structural foundation for roof systems. They also:

Encloses Building from Wind
Provides Fire Resistance as Part of UL Assembly
Structural Base of Roof Membrane
Resists Dead, Snow, Roof Live, Seismic and Wind Loads
Transfers Wind and Seismic Loads to Vertical Components of Lateral Force Resisting Systems through Diaphragm Action
Roof Deck Not Intended to Be Watertight in Any Circumstance!!

Please keep in mind that roof decks are not intended to be watertight in any circumstance. Roof deck 1.5" type B offers predictable performance and widespread industry acceptance. This wide-rib profile delivers 36-inch coverage and supports insulation placement or membrane layers across large facilities. For applications involving concrete fill, consider our specialized composite floor deck systems. Most industrial teams specify this profile because it balances material efficiency with structural strength.

Roof Deck 1.5" Type B:

"B" deck is generally known as "wide rib" deck
The most common deck profile in the industry and by far the most widely used
Comes in 36” coverage

Choose James River Steel for Type B Decks

Choose James River Steel for type B deck. We support your project with dependable materials, detailed guidance, and responsive service. We encourage you to reach out for lead times and technical insights so your project receives the right decking solution from the start.

Request a quote today for pricing and availability on our type B roof decking. Our team stands ready to deliver high-volume orders, consistent quality, and support that keeps your schedule moving.

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Frequently Asked Questions

What Minimum Order Size Do You Accept?

We require a minimum of 500 sq ft per production run for standard Type B deck panels.

Which Materials Do You Offer for Type B Panels?

We supply a range of materials and provide material certificates when needed, including:

Can You Cut Panels to Custom Lengths?

Yes, we cut all type B deck lengths to your specifications and verify accuracy before shipping.

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